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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0bc3d802b959ac80a3306fe78b23487c096d897e9cdfe65246f0cc621fe2586e' 
  AND token = 'GEO8PZcC9cWUOl61pP5t7JzIuWH1sHySjVOAtLtQAfc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00054

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}